Aloha Uly,
you can work on any area specifically, but be sure to work on the blockages you've found during your detection, rather than just chasing the pain/symptoms.
For your dog example, go through the healing steps as Chunyi demonstrates in the Level 2 DVD. There is not a limit on the areas you can work on in the same session. You can use sword fingers on the the lump blockages.
You intent and focus is where the sword finger energy is going. Since it's not the heart, then it's not an issue - even if your shooting at something on the other side of the heart.
Much Love, Shawn
